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t.vect.what.strds(1grass)

NAME

   t.vect.what.strds   -  Stores raster map values at spatial and temporal
   positions of vector points as vector attributes.

KEYWORDS

   temporal, sampling, vector, time

SYNOPSIS

   t.vect.what.strds
   t.vect.what.strds --help
   t.vect.what.strds input=name strds=name  [column=string]  method=string
   [where=sql_query]     [t_where=sql_query]    [sampling=name[,name,...]]
   [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
   --help
       Print usage summary

   --verbose
       Verbose module output

   --quiet
       Quiet module output

   --ui
       Force launching GUI dialog

   Parameters:
   input=name [required]
       Name of the input space time vector dataset

   strds=name [required]
       Name of the input space time raster dataset

   column=string
       Name of the vector column to be created and to store sampled raster
       values
       The  use  of  a  column name forces t.vect.what.rast to sample only
       values from the first map  found  in  an  interval.  Otherwise  the
       raster map names are used as column names

   method=string [required]
       Aggregate operation to be performed on the raster maps
       Options:   disabled,   average,   count,   median,  mode,  minimum,
       min_raster, maximum,  max_raster,  stddev,  range,  sum,  variance,
       diversity,   slope,   offset,  detcoeff,  quart1,  quart3,  perc90,
       quantile, skewness, kurtosis
       Default: disabled

   where=sql_query
       WHERE conditions of SQL statement without 'where' keyword
       Example: income < 1000 and inhab >= 10000

   t_where=sql_query
       WHERE conditions of SQL statement without 'where' keyword  used  in
       the temporal GIS framework
       Example: start_time > '2001-01-01 12:30:00'

   sampling=name[,name,...]
       The method to be used for sampling the input dataset
       Options: start, during, overlap, contain, equal, follows, precedes
       Default: start

DESCRIPTION

   The  module  t.vect.what.strds  samples  a  space  time  raster dataset
   (STRDS) at the spatio-temporal locations of a space time vector dataset
   (STVDS).

EXAMPLE

   The   example   is   based   on   the   space   time   vector   dataset
   "precip_stations@climate_2009_2012" created in the t.vect.observe.strds
   example.   In  the  example  below,  the  module  fills  the new column
   "new_temp" with values extracted from the "tempmean_monthly" space time
   raster dataset:
   t.vect.what.strds input=precip_stations@climate_2009_2012 \
                     strds=tempmean_monthly@climate_2009_2012 \
                     column=new_temp method=average

AUTHOR

   Sren Gebbert, Thnen Institute of Climate-Smart Agriculture

   Last changed: $Date: 2016-10-27 23:24:04 +0200 (Thu, 27 Oct 2016) $

SOURCE CODE

   Available at: t.vect.what.strds source code (history)

   Main index | Temporal index | Topics index | Keywords index | Graphical
   index | Full index

    2003-2016 GRASS Development Team, GRASS GIS 7.2.0 Reference Manual

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